The Lenox Tools 2011448CHCCarbide Tipped Hole Cutter-48CHC 3-Inch or 76MM is designed specifically for Sheet metal Hole Cutting. The Carbide hole cutter provides accurate, burr-free holes through the use of precision ground carbide teeth. The cutter also features an over-drill stopper to prevent the tool from penetrating beyond the whole. The Split point pilot bit starts on contact for faster penetration and less walking.